/Engine/Source/Editor/DetailCustomizations/Public/Customizations/MathStructProxyCustomizations.h
Flush the values from the proxy to the property.
true if values(s) were successfully flushed
bool FlushValues ( [TWeakPtr](API\Runtime\Core\Templates\TWeakPtr)< [IPropertyHandle](API\Editor\PropertyEditor\IPropertyHandle) > WeakHandlePtr ) const